Starting device for multicylinder internal-combustion engines.



K. PEILNER. STARTING DEVICE FOR MULTICYLINDER INTERNAL COMBUSTION ENGINES.

APPLIUATION FILED APR. 25. 1913 Patented Feb. 2, was.

KARL FEILNER. as swallows, GERMAiiY,

STARTING DEVICE FOR SKULTICYLINDER INTERNAL-COMBUSTION ENG-X17353.

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Specification of Letters Patent.

Families Feb. 2 isla- Application filed April :65, 1913. Serial lilo. 763.518.

To all whom in my concern Be it known that LKARL FiuLNEiga sub;-

, jcct of the German Emperor, and a resident of Nuremberg, Bavaria, Germany, have inveutczl certain new and useful. Improve mcnizs in ancl'llclating to Starting Devices for lilulticylimlcclnternaLCombustioo Engines. oi which the followingis a specificalion. l

This invention relates to improvements in starting mechanisms for internal combos tiou engines. in which compressed air is wused.

'Figuves 1. and are cross sections of my (lance taken at right angles to each other. Rowling mechan sms aroalrcadv known in which the starting valve is provided with :1 wmlrolliug piston to which compressed air is supplied by moons of separate dis- 2'1) lrilmllug mvcs, (one cacli fol-starting, forward. and; backward running). The air control valvosin question arcinovedouly lining the starting ll means of suitably shaped cams on a control shaft. During this time they are in fact forced by compressed air against the cams, but at other times, that is to say during the uormalrunuing of the engine, they arc'lifted off the cams azul are consequently stationary. 'Qlhe so air control valves thus have a double function: they must allow the compressed all to pass to the controlling pisto'u of the starting valve, that is to say, alternately allow compressed ail into the pipe leadiug to them 35.:iucl then allow this to exhausii from the pipe. On account of this double function which these valves must perform, slide valves or cocks have usually been selected for shutting oil? the compressed :1ir.,'as they are comparatively simple anrlhavefew constructional pal-ls. These air control valves, however, form a very sensitive portion of the x-omplimtedcompressed air starting apparulus cud. they may easily cause stogpagcs of the entire apparatus. Those conti ol slicl valves, in soils of being mos'fi carefully unu'lc. are in fact very clillicull; to tight agzsiiis cm: high pressure of thc slartiug all. and it'ui'llier the slide valves become cm 5% roiled or during longperiods of regular working of Che engine. during which they are inoperative, often becomcilxed by the combined action of dirl; or (lriod oil and than fail to och when it is oesirccl to start; or

reverse the engine. According to this in vei sion, however, valves with conical scat;- iugs, such as puppet valvesare employed. in o 'd e to thereby exclude the possibility oiibroakclown. 1

'Tliopresenl; invention is more particu larly described with reference to the form of construction illustrated in the accompanying drawings;

The shorting valve a of known type is connected to a controlled piston 5, on which the compressed air first acts and is after Ward (luly exhausted. Three valves 0, d and 7' are provided for con'lu'olliug the compressed all passiscg to-the starting valve. Of thelse valves, 0 and f serve. both for ad" milling the compresscd air and also to allo v it to exhaust from the pipe which ex tends from the controlling valvcsto the starting valve (2,, while the valvo [Z is exclusivelv used for exhausting this pipe. The valve 0 serves for starting in the forward direction llle valve f forssarting in the reverse direction. A Pipe; 2 serves fox conveying the compressed air fozistartin in the forward direction of running, an the pi e 3 for starting in the ifcversodirec lion o running. Both pipes 2Qaucl 3 lead from the compressed air reservoir. Qo each of these, two pipes two valvesi if and 9 iv? are inserted respectively. The valves k and, h? are closed by the pressure of the starting air during the. normal running of the cngiu, while the valves 9 anol g are openedin order to exhaust the coufrol mechanism, If the engine is to be started the respective exhaust; valve g or g is closed and the respective admission valve h or if opencch so that compressed air can pass to the coulz'olling valve 0 or f respectively. It is not necessary to proviole a set of valves g, g", 32 aml. is, for each cylinder; it

suiiices' to provide rloulJ-le pair of these or the Whole oi. the worming; cylln an engine, namely, one foal! for sta ling i-o lZhZ 'l Ql'WHIQl direction cull one pail". for sarling in she reverse direoisioo.

The. ooot 'olling vslves c, 03, y", ovoopocatevl li v ithree cams 3Z2, 5,, vespectivoly, which are liBYQfl oo llic shaft in The cams act .llltlllui gi lf on the spindles of sho valves Q, (l, f, through levers oi By this means no lateral pressure is @Iillltd on the valve spindles by the owns. 4 The levers is are pivotally mounteo on plus 9. They are provided with abutmcnts o in conical with, .130

2 i im s.

the valve spindles c, d, f, and with rolltrsp in contact with the cams. .1

During the normal running of the engine the levers n are lifted by means of eccentrics 7' away from the cams i, k, to open the 'controlling valves 0, d,

If the engine is, for example, to be started in the forward directiomthe levers n are first brought by means of the eccentrics a" into the position illustrated in Fig. 2, so

that the rollers 79 rest on the cams 'a-nd the .valves 0, d, f, tend toclose and lie in posi- V tions depending on the position of their respective cams.

The exhaust valve 9 is then closed andthevalve k opened, so that cornpressed air can, reach (the valve 0. Now this apparatus is intended for multicylinder engines, and therefore a separate starting mechanism of the kind described above is necessary for each working cylinder. The

' various starting mechanisms are adjusted in the cam is will open the valved and this then allows the compressed air in the pipe to escape through the hole 2.. When the cam releases thevalve I} ,and this has consequently 40' The valve 7 remains open until the cam'i admission of air to "the piston b, while the such. a Way that the cam of at least one cylinder keeps the respective controlling valve 0 open. Consequently in this particuldrnylinder compressed air passes through the opened valve '0 and the pipe 1 to the piston b of the starting valve a and opens the latter,

so that compressed air can pass directly through the pipe 4; into that cylinderand set the engine going. The cam shaft m-will be thereby .turned. As soon as the cam 71 is turned to allow the valve 0 to again close,

closed, the cam l opens the valve f which then allows the compressed air in'the pipe 1 to continue to escape, through the pipe 3 and the valve gh' which then happens to be open.

commences to open the starting valve '0 for the forwarddirection, whereupon the cycle controlling valve 0 acts as exhaust valve. The valves 0 and f. and the cams 'i-and Z thus exchange functions.

, From. the action of the apparatus it isevident that thevalves c and 7" must be provided with strong closing springs u and 21 respectively, because in starting they must remain closed against the pressure of the compressedair-which bears on their under side. On the other hand a weaker closing valve is forcetl'by. the pressure of the compressed air acting on its upper s1de down on to its seat."

-spring suliicesflfor the valve 03, because'this The membersiwhich must be moved instarting, and reversihg, that is to say the valves- 'h and h and the eccentric r may-be operated in any known'manner by a common member such as a lever, ratchet wheel or the like with which the valves g, 9 k and h, and the eccentric r are con-- nected by suitable rod connections 1n such a way that they are operated in the correct succession.

Instead of.i od connections thet'ransmission of movement ,may be effected in an al- 're ady known manner by means of a compressed fluid or gaseous medium.

Having now particularly described and s;

and in what; manner the same is to be performed, I declare that what I claim is 1. A starting and reversing device fpr multi-cylinder internal combustion engines comprising. three valves for each'cylinder for controlling the compressed air actuating the ascertained the nature of my said invention starting v a compressed Pipe leading 'to the starting valve, one of said valves serving exclusively for exhausting the com-f pressed air pipe, the two others serving alternately according to the starting direction, either foradmitting or exhausting the compressed air insaid air pipe leading to the.

starting valve.

2. A starting multicylinder internal combustion engines comprising three valves having conical seatings for each cylinder for controlling the compressed air actuating the startingvalve,

a compressed air pipe leading to the starting valve, one of saidvalves servingexclusively for. exhausting the compressed air p1pe, the

two others seg ing alternately according to the starting'un'ection, e ther for admitting or exhausting the compressed'airin said. air

pipe leading to the starting valve.

Signed at Nuremberg, Germany, this 9th I day of April 1913'. I p KARL FEILNER. Witnesses:

OSCAR Boon, Srorronn Roman.

e and reversing device for 

